A lifting device for insulated doors in tunnels in cold and high-altitude areas

Abstract

This utility model discloses a lifting device for an insulated door in tunnels located in high-altitude and cold regions. The device includes a door body, a load-bearing beam, support columns, a double-swing electric hoist, and a control box. The door body is composed of a frame, a concrete layer, a polystyrene plastic layer, a centrifugal glass wool layer, an aluminum alloy plate, and an aluminum foil reflective film, providing excellent thermal insulation and sealing performance. The support columns and load-bearing beams are reinforced with ribs to ensure structural stability. The double-swing electric hoist is connected to the door body lifting lugs (b) via wire ropes and a rotary connector, and, in conjunction with limit rods and stop rods, achieves limited lifting and lowering of the door body. The control box enables automated control. This device effectively prevents cold air from entering the tunnel, fundamentally avoiding freeze-thaw damage to the concrete, eliminating the need for frequent repairs, reducing maintenance costs and safety risks, and featuring a stable structure, convenient operation, and suitability for the harsh environment of high-altitude and cold regions, ensuring long-term stable operation of the tunnel.

Description

Technical Field

[0001] This utility model relates to the field of tunnel insulation door technology, and in particular to a lifting device for tunnel insulation doors in high-altitude and cold regions. Background Technology

[0002] Currently, China's hydropower and water conservancy industry is developing rapidly, and the number of diversion and drainage tunnels being built is constantly increasing. Among them, tunnels in high-altitude and cold regions face severe challenges in winter. These regions experience long winters and extremely cold weather, making tunnel entrances highly susceptible to severe icing, which can lead to freeze-thaw damage to the tunnel concrete, seriously affecting the quality and overall stability of the tunnel concrete.

[0003] In existing technologies, tunnels that have suffered freeze-thaw damage are typically treated by simply repairing them. This approach cannot fundamentally solve the freeze-thaw problem. Furthermore, repair work is carried out while the tunnel is in operation, which not only adds a significant amount of extra work and increases maintenance costs, but also poses high safety risks during the repair process, making it difficult to meet the long-term stable operation requirements of tunnels in high-altitude and frigid regions. Utility Model Content

[0004] The present invention aims to solve the problems mentioned in the background art above, and provides a lifting device for insulated doors in tunnels in high-altitude and cold regions, so as to overcome the defects of the prior art in which tunnels in high-altitude and cold regions are prone to freezing in winter, resulting in freeze-thaw damage to concrete, and the existing repair methods cannot fundamentally solve the problem.

[0005] To achieve the above-mentioned utility model objectives, the present utility model adopts the following technical solution: a lifting device for a tunnel insulation door in high-altitude and cold regions, comprising a door body, a load-bearing beam A, and a support column. The door body is composed of a frame, a concrete layer, a polystyrene plastic layer, a centrifugal glass wool layer, an aluminum alloy plate, and an aluminum foil reflective film, which are sequentially composited. Sealing strips are provided on the upper and lower sides of the door body. Two lifting lugs a and two lifting lugs b are fixed on the top two sides of the door body, respectively. The bottom of the support column is fixed to the ground through a fixing seat. The top of the support column is welded and fixed to the load-bearing beam A. Limiting rods are connected between the support columns on the same side. A double-lifting electric hoist is fixedly connected to the bottom of the load-bearing beam A through a mounting plate. The double-lifting electric hoist is rotatably connected to a rotating connector fixed on the lifting lug b through a wire rope. The lifting lugs a on both sides of the two lifting lugs b are circular. A stop bar is inserted through the two lifting lugs a. The stop bar and the limiting rod are perpendicular to each other. A control box is provided on the top of one side of the support column.

[0006] Furthermore, the polystyrene plastic layer is tightly bonded to the centrifugal glass wool layer, and the aluminum foil reflective film covers the outer surface of the aluminum alloy plate, forming a double-layer thermal insulation structure.

[0007] Furthermore, a rib is provided at the connection between the load-bearing beam A and the support column; the rib has a triangular structure; and both ends of the rib are welded and fixed to the load-bearing beam A and the support column, respectively.

[0008] Furthermore, the fixing base is connected to the concrete platform by expansion bolts and is equipped with anti-slip pads.

[0009] Furthermore, the control box is electrically connected to the double-swing electric hoist via a cable.

[0010] Compared with the prior art, this utility model has the following advantages: This utility model, through its multi-layered composite gate structure combined with double insulation layers and a sealing structure, effectively blocks cold air from entering the tunnel, reducing heat loss within the tunnel. It fundamentally solves the problem of concrete freeze-thaw damage caused by icing at the tunnel entrance in winter in high-altitude and cold regions, avoiding the extra work and costs associated with frequent repairs. The lifting mechanism uses a double-lift electric hoist drive, along with a rotary connector and limit components, achieving stable, precise, and automated lifting of the gate. Operation is convenient and highly safe, reducing manual labor intensity and operational risks. The overall structure possesses excellent cold resistance, pressure resistance, and wind resistance, adapting to the harsh environment of high-altitude and cold regions, ensuring long-term stable operation of the tunnel, extending its service life, and meeting the long-term operation and maintenance needs of drainage tunnels in the hydropower and water conservancy industry. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a bottom view of the structure of this utility model; Figure 3 This is a schematic cross-sectional view of the door body of this utility model.

[0012] Legend: 1-Door body, 101-Frame, 102-Concrete layer, 103-Polystyrene plastic layer, 104-Centrifugal glass wool layer, 105-Aluminum alloy plate, 106-Aluminum foil reflective film, 2-Bearing beam, 3-Support column, 4-Fixed seat, 5-Rib plate, 6-Limit rod, 7-Double-hanging electric hoist, 8-Rotary connector, 9-Lifting lug a, 10-Stop bar, 11-Wire rope, 12-Cable, 13-Control box, 14-Lifting lug b, 15-Sealing strip, 16-Mounting plate. Detailed Implementation

[0013] The following will refer to the appendix in the embodiments of this utility model. Figure 1-3The technical solutions in the embodiments of this utility model will be clearly and completely described. A lifting device for an insulated tunnel door in high-altitude and cold regions includes a door body 1, a load-bearing beam 2, and a support column 3. The door body 1 is composed of a frame 101, a concrete layer 102, a polystyrene plastic layer 103, a centrifugal glass wool layer 104, an aluminum alloy plate 105, and an aluminum foil reflective film 106, which are sequentially composited. The polystyrene plastic layer 103 and the centrifugal glass wool layer 104 are tightly bonded together, and the aluminum foil reflective film 106 covers the outer surface of the aluminum alloy plate 105, forming a double-layer thermal insulation structure. Sealing strips 15 are provided on the upper and lower sides of the door body 1. When the bottom sealing strip 15 contacts the ground, it effectively seals the tunnel. Similarly, the sealing strip 15 at the top of the door body 1, inserted into the tunnel entrance, forms a sealed environment with the top wall. Two lifting lugs a9 and two lifting lugs b14 are fixed to the top sides of the door body 1, respectively. The bottom of the support column 3 is fixed to the ground via a fixing seat 4, which is connected to a concrete platform by expansion bolts and is equipped with anti-slip pads for stability. The support column 3 is welded and fixed to the top of the load-bearing beam 2 to form a frame structure; a rib plate 5 is provided at the connection between the load-bearing beam 2 and the support column 3; the rib plate 5 has a triangular structure; the two ends of the rib plate 5 are welded and fixed to the load-bearing beam 2 and the support column 3 respectively; the support columns 3 on the same side are connected by limiting rods 6 respectively; a double-lift electric hoist 7 is fixedly connected to the bottom of the load-bearing beam 2 by an mounting plate 16; the double-lift electric hoist 7 is rotatably connected to the rotating connector 8 fixed on the lifting lug b14 by a wire rope 11; the lifting lugs a9 on both sides of the two lifting lugs b14 are circular; a stop rod 10 is inserted through the two lifting lugs a9 respectively; the stop rod 10 and the limiting rod 6 are set perpendicular to each other, and both are made of high-strength alloy steel to limit the displacement deviation of the door 1 during lifting and lowering; a control box 13 is provided on the top of one side of the support column 3; the control box 13 is electrically connected to the double-lift electric hoist 7 by a cable 12.

[0014] In use, the double-lift electric hoist 7 is started via the control box 13. The double-lift electric hoist 7 lifts the gate body 1 via the wire rope 11. The limit rod 6 and the stop rod 10 limit the displacement height of the gate body 1 to ensure smooth lifting. When the tunnel needs to be closed for insulation, the double-lift electric hoist 7 is controlled by the control box 13 to slowly release the wire rope 11. The gate body 1 slowly descends to the tunnel entrance, and the sealing strip 15 fits tightly with the entrance to achieve sealing and insulation. The rotary connector 8 can adapt to the angle fine adjustment during the lifting and lowering of the gate body 1 to avoid the wire rope 11 from getting tangled. The whole operation does not require close-range manual operation, has high safety, good insulation effect, and can effectively resist the severe cold weather in high-altitude and cold regions, protecting the tunnel concrete structure.

[0015] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model based on the technical solution and its improved concept should be covered within the protection scope of the present utility model.

Claims

1. A high-cold high-altitude tunnel heat preservation door hoisting device, comprising a door body (1), a bearing beam A (2) and a support column (3), characterized in that: The door body (1) is composed of a frame (101), a concrete layer (102), a polystyrene plastic layer (103), a centrifugal glass wool layer (104), an aluminum alloy plate (105), and an aluminum foil reflective film (106) in sequence; the door body (1) is provided with sealing strips (15) on the upper and lower sides; two lifting lugs a (9) and two lifting lugs b (14) are fixed on the top two sides of the door body (1); the bottom of the support column (3) is fixed to the ground through a fixing seat (4); the top of the support column (3) is welded and fixed to the load-bearing beam A (2); the support columns (3) on the same side are connected to each other. The load-bearing beam A (2) is connected by a limiting rod (6); a double-lift electric hoist (7) is fixedly connected to the bottom of the load-bearing beam A (2) by a mounting plate (16); the double-lift electric hoist (7) is rotatably connected to the rotating connector (8) fixed on the lifting lug (14) by a wire rope (11); the lifting lugs a (9) set on both sides of the two lifting lugs b (14) are in the shape of a ring; a stop rod (10) is inserted through the two lifting lugs a (9); the stop rod (10) and the limiting rod (6) are set perpendicular to each other; a control box (13) is set on the top of one side of the support column (3).

2. The lifting device for insulated doors in tunnels in high-altitude and cold regions according to claim 1, characterized in that: The polystyrene plastic layer (103) is tightly bonded to the centrifugal glass wool layer (104), and the aluminum foil reflective film (106) covers the outer surface of the aluminum alloy plate (105), forming a double-layer thermal insulation structure.

3. The lifting device for insulated doors in tunnels in high-altitude and cold regions according to claim 1, characterized in that: The connection between the load-bearing beam A (2) and the support column (3) is provided with a rib plate (5); the rib plate (5) has a triangular structure; the two ends of the rib plate (5) are welded and fixed to the load-bearing beam A (2) and the support column (3) respectively.

4. The lifting device for insulated doors in tunnels in high-altitude and cold regions according to claim 1, characterized in that: The fixed seat (4) is connected to the concrete platform by expansion bolts and is equipped with anti-slip pads.

5. A lifting device for insulated doors in tunnels in high-altitude and cold regions according to claim 1, characterized in that: The control box (13) is electrically connected to the double-swing electric hoist (7) via cable (12).

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